swapiness
Brian Cluff
brian at snaptek.com
Tue Mar 1 09:54:14 MST 2016
Oops, I forgot to mention that you'll need to reboot for the setting to
take effect.
Brian Cluff
On 03/01/2016 08:45 AM, Brian Cluff wrote:
> Check out Hans' "Anatomy of the command line" talk that he gave at
> SCaLE. It will show you in detail why that didn't work.... you'll learn
> a lot. It's at: https://www.youtube.com/watch?v=Yx_dCte3dEE
>
> As for setting the swappiness permanently create and edit
> /etc/sysctl.d/10-swappiness.conf, it probably won't exist by default.
> Then put a single like it that is:
>
> vm.swappiness=10
>
> If you want your swappiness set to 0, just change the 10 to 0
>
> Brian Cluff
>
> On 03/01/2016 06:26 AM, Michael wrote:
>> I understand. The computer would not allow me to use sudo with
>> redirection .
>>
>> On Tue, Mar 1, 2016 at 1:09 AM, Michael <bmike1 at gmail.com
>> <mailto:bmike1 at gmail.com>> wrote:
>>
>> fyi: when I attempted to save it in gedit it gave me the permission
>> denied error.
>>
>> On Tue, Mar 1, 2016 at 1:08 AM, Michael <bmike1 at gmail.com
>> <mailto:bmike1 at gmail.com>> wrote:
>>
>> What am i doing incorrectly?
>>
>> $ sudo cat /proc/sys/vm/swappiness
>> 60
>> bmike1 at MikesBeast ~ $ sudo cat 30>> /proc/sys/vm/swappiness
>> bash: /proc/sys/vm/swappiness: Permission denied
>> bmike1 at MikesBeast ~ $ sudo gedit
>> bmike1 at MikesBeast ~ $ sudo gedit /proc/sys/vm/swappiness
>>
>> ** (gedit:10639): WARNING **: Hit unhandled case 13 (Error
>> writing to file: Invalid argument) in parse_error.
>>
>> ** (gedit:10639): WARNING **: Hit unhandled case 13 (Error
>> writing to file: Invalid argument) in parse_error.
>> bmike1 at MikesBeast ~ $ sudo cat >> /proc/sys/vm/swappiness<<eof
>> > 1
>> > eof
>> bash: /proc/sys/vm/swappiness: Permission denied
>> bmike1 at MikesBeast ~ $ sudo cat >> /proc/sys/vm/swappiness<<eof
>> 1
>> eof
>> ^C
>> bmike1 at MikesBeast ~ $ sudo cat /proc/sys/vm/swappiness
>> 1
>>
>> WHATEVER! lol
>>
>> On Tue, Mar 1, 2016 at 12:43 AM, Michael <bmike1 at gmail.com
>> <mailto:bmike1 at gmail.com>> wrote:
>>
>> have a desktop. in any case I searched google this swapiness
>> question and here is what it says:
>>
>> "
>> After rebooting the swappiness is set to 10. This can be
>> checked by
>> running the following command in a terminal: sudo cat
>> /proc/sys/vm/swappiness.
>> The swap tendency can have a value of 0 (fully off) to 100
>> (swap is constantly used).
>> A workable and practical rule for changing the swappiness
>> can be:
>> 1 GB or more RAM: 10
>> Less than 1 GB of RAM: 1
>> _*Tip:*_
>> Your computer has less than 512 MB of RAM? Try to change
>> the swap tendency to 0 (zero). With lower amount of memory
>> installed, this might even give a better result then
>> changing the swap tendency to 1.
>> "
>>
>> Why is 0 better than 1?
>>
>> On Tue, Mar 1, 2016 at 12:38 AM, Kevin Fries
>> <kevin at fries-biro.com <mailto:kevin at fries-biro.com>> wrote:
>>
>> Linux is not Windows. Linux can, and will run without
>> using swap if it can. Linux will remain RAM resident
>> unless it has to. So, what they are telling you is
>> this... If you don't need swap, don't define it.
>>
>> There is one exception to this rule, since you are using
>> a laptop. There are two instant on technologies, sleep
>> and hibernate. One of the will stash the state to RAM,
>> the other to swap. I forget which is which. But if it
>> needs to go to swap, you will need a swap file equal to
>> RAM if you use that feature.
>>
>> Kevin
>>
>> On Feb 29, 2016 10:32 PM, "Michael" <bmike1 at gmail.com
>> <mailto:bmike1 at gmail.com>> wrote:
>>
>> swapiness=..... 0? Remember; I am
>> computer-illiterate!
>>
>> On Mon, Feb 29, 2016 at 11:47 PM, Todd Millecam
>> <tyggna at gmail.com <mailto:tyggna at gmail.com>> wrote:
>>
>> Disable swap. Never activate it on boot. If
>> you start reaching oom conditions, turn it
>> back on.
>>
>> On Mon, Feb 29, 2016 at 9:38 PM, Michael
>> <bmike1 at gmail.com <mailto:bmike1 at gmail.com>>
>> wrote:
>>
>> What do you recommend you reduce swapiness
>> to for machines that have plenty of memory
>> that will probably never be filled?
>>
>> --
>> :-)~MIKE~(-:
>>
>>
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>>
>> --
>> Todd Millecam
>>
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>>
>>
>>
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>> :-)~MIKE~(-:
>>
>>
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>>
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